Hot-rolled slab warping detection device and method

The invention provides a hot-rolled slab warping detection device and method, which belong to the technical field of intelligent metallurgy rolling. The device comprises a single-line laser radar, a laser radar mounting bracket, a water cooling machine, a laser radar server and a calibration plate. Firstly, the calibration plate on a roller way is scanned by the single-line laser radar for calibration, and external parameters of the single-line laser radar relative to a world coordinate system are obtained; pose transformation is conducted to convert the point cloud of the single-line laser radar coordinate system into a world coordinate system; then the single-line laser radar scans the moving plate blank to capture head point cloud data of the plate blank, pose transformation is carried out in combination with roller way speed information, and three-dimensional point cloud information is generated; slab head point cloud features are obtained through point cloud processing and feature extraction; and finally